Velez Sarsfield went top of the Argentine championship on Sunday by winning 1-0 at coachless San Lorenzo, who were insulted by their fans throughout the game.
The home supporters were furious at their team's poor recent results which culminated with their elimination from the South American Libertadores Cup on Wednesday after a 2-0 defeat to San Luis in Mexico.
Coach Miguel Angel Russo resigned immediately after the match and the team were greeted by around 60 protesting fans when they arrived at Buenos Aires' international airport on Friday.
The hostility continued on Sunday as supporters at the Nuevo Gasometro stadium jeered and insulted the team.
Striker Gonzalo Bergessio insinuated that the players had been treated like criminals.
"We're not murderers and we haven't killed anyone," he told reporters. "We're aware that we were not good enough for the Copa Libertadores."
The only goal came five minutes before halftime when Rodrigo Lopez won and converted a penalty for Velez.
Still unbeaten after nine games, Velez lead the Clausura championship with 19 points, one ahead of Colon and Lanus.
Titleholders Boca Juniors dropped to 11th after losing 1-0 at Estudiantes, where Gaston Fernandez scored from a free kick two minutes before halftime.
Racing Club, one of the most popular in the country, moved out of the relegation zone after winning 1-0 away to fellow strugglers Rosario Central with a Franco Sosa free kick.
Racing, who recently emerged from 10 years' bankruptcy, moved up to 16th in the relegation standings while Central dropped to 17th, which would mean playing off against a second division team to keep their place.
Relegation is decided by a complex system decided over three full seasons.